package com.pi.nbcenter.base.consistency;


import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

@Order(0)
@Component
public class SpringContextHolder implements ApplicationContextAware{
  private static ApplicationContext context;
  
  @Override
  public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
    context = applicationContext;
  }
  
  public static ApplicationContext getApplicationContext(){
    return context;
  }
  
  /**
   * 通过name获取 Bean.
   * @param name
   * @return
   */
  public static Object getBean(String name){
      return getApplicationContext().getBean(name);
  }

  /**
   * 通过class获取Bean.
   * @param clazz
   * @param <T>
   * @return
   */
  public static <T> T getBean(Class<T> clazz){
      return getApplicationContext().getBean(clazz);
  }

  /**
   * 通过name,以及Clazz返回指定的Bean
   * @param name
   * @param clazz
   * @param <T>
   * @return
   */
  public static <T> T getBean(String name,Class<T> clazz){
      return getApplicationContext().getBean(name, clazz);
  }
  
}
